JAY CARNEY: So I don’t have these moments of crisis very much. Credibility’s enormously important for press secretaries. All of the predecessors, my living predecessors, I spoke with all of them before I took this job. I knew all of them, already. Whether they served a Republican president or a Democratic one, they all talked about the need to maintain your credibility. Which means, when I go and stand up in front of the podium, in front of the White House press corps, I never lie. I never say something that I know is not true. That means when I don’t know the answer to something, I say I don’t know and I’ll take that question, that means that when I—which is often the case, I know more than I can say—I answer it in a way that is truthful without obviously betraying the things that I can’t say for national security reasons or other reasons. But that’s—it’s a fundamental principle of doing the job that, for the folks who cover a president, they have to have some faith–substantial faith—that while they know I can’t say everything, and those who work for the president can’t say everything, what we are saying is true.

Carney also battled this month with Fox News reporter Ed Henry and CBS News reporter Norah O’Donnell after he claimed the president had not said it would be an “unprecedented” step for the Supreme Court to overturn Obamacare:

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